If it is micronized you can spray it also ...
"To use the pulverizing diatomaceous earth, what we will spray the plant well, ensuring that sensitive areas of pest attack we are trying, are well coated with liquid diatomaceous earth that we are applying. Also we will deposit around the plant, at its base, so that soil pests, such as caterpillars and slugs or snails, can not approach them. The amounts depend on the pest to be treated and the stage of the pest, if an incipient plague or well advanced pest, or if it is a plague of thrips or plague of slugs .
For pest control lawn , it is best to spray the diatomaceous earth on the same routine every watering (understanding that watered early in the morning or late afternoon). Land of micronized diatom be fixed to the grass when water evaporates and prevent proliferation of any insect (flies, mosquitoes, ants, etc ...), parasite (fleas, ticks, etc ...) or mollusk (snails, slugs, etc ...) unwanted in our garden.
When pulverize with diatomaceous earth micronized our culture, we are, at the same time protecting it in the warm periods of heatstroke that besides damaging the fruit, they generate a very high stress on the plant or tree of our culture. Diatomaceous earth pulverized when dry and water is evaporated leaves a thin layer of white on the surface of the floor covering this a powerful reflective, which also protect against heat from a sun stroke, also it will hide the fruits like olives parasites such as olive fly , thus preventing pests such as this occur."